Intrinsic effects of substitution and intercalation on thermal transport in two-dimensional TiS2 single crystals

The promising thermoelectric material TiS2 can be easily chemically doped and intercalated. We present here studies of single crystals that are intercalated with excess Ti or Co, or substituted with Ta. We demonstrate the intrinsic impact of these dopants on the thermal transport in the absence of g...

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Veröffentlicht in:Journal of applied physics 2015-04, Vol.117 (16)
Hauptverfasser: Daou Ramzy, Hébert Sylvie, Beaumale Marine, Guilmeau Emmanuel, Maignan Antoine
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Sprache:eng
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Zusammenfassung:The promising thermoelectric material TiS2 can be easily chemically doped and intercalated. We present here studies of single crystals that are intercalated with excess Ti or Co, or substituted with Ta. We demonstrate the intrinsic impact of these dopants on the thermal transport in the absence of grain boundary scattering. We show that Ta doping has the greatest impact on the thermal scattering rate per ion added, leading to a five-fold reduction in the lattice thermal conductivity as compared to stoichiometric single crystals.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4919078